I love games like this! Even as a demo, it's simple and easy to pick up. The controls weren't terribly clear at first but it was easy enough to figure out. E to pick up and Q to drop. And then you just walk into stuff.
If I could offer a couple of quality-of-life improvements for future updates?
The first being a mouse reticle to show where you're looking, and the second being a keybind pop-up to show what buttons you should press to do the action.
Besides that, I really enjoy these types of games! Very easy to play for a bit, and the satisfaction of having the clean space is nice! The lack of music made me worried this was a horror game, but when I cleared the tutorial, I was happy! (the return to menu button from tutorial doesn't work - reloading the browser worked :)
I hope you continue making this game!